Governor for internal-combustion engines



GOVERNOR FOR INTERNAL COMBUSTION ENGINES Filed May 13, 1920 25; Z Ii 5' C' as" a i ,4 a 2/ ljid' I I wuvmtoz f S rqrafflxfms en Patented July 13, 1926.

UNITED STATES PATENT OFFICE.

BIGVABD H. JENSEN, OI DETROIT, MICHIGAN, ASSTGNOB TO IONARCH GOVERNOR COMPANY, 01', DETROIT, MIGHIGAN, A CORPORATION 01' MICHIGAN.

GOVERNOR FOR INTERNAL-COMBUSTION ENGINES.

Application fled lay is, 1920. s rial no. aa1,o47.

The invention relates to governors. for internal combustion engines of that type in which a throttle valve is operated by amember arranged within the intake and exposed to differential pressure. It is the object of the invention to overcome certain defects in governors of this type and particularly to avoid reduction in power, due to the obstruction of the intake by the throttle connecting member. A further object is to .obtain a simple mechanical construction.

In the drawings Figure 1 is a longitudinal section through the governor; v

Figure 2' is a similar view taken in a transverse plane;

Figure 3 is a side elevation viewed as in Fi re 2.

is a casing adapted to be inserted in the engine intake between the manifold and the carburetor. B is the throttle valve in thecasing A, and C is the actuating member for the throttle arranged in the casing on the engine side of said throttle.

As heretofore constructed, it is usual to employ for the member'C a disk extending transversely to the longitudinal axis of the intake and movable along said axis and within a tapered portion of the casing. This disk will be exposed to differential pressure, due to the movement of the as through the intake and through suita 1e connections will actuate the throttle valve in one direction, while a spring or other opposing force will act upon said valve to move it 1n the o posite direction. A serious defect with such governors is the obstruction to the flow of gas formed by the disk, which is sufiicient to considerably reduce the maximum power output of the engine. It is one of the features of my invention to avoid this defect by substituting for the disk-actuating member a stream-lined member, which will produce but slight resistance to the free passage of the gas. At the same tiine there will be a difference in the static pressure operating upon opposite sides of said stream-lined member, which will furnish the requisite force for adjusting the throttle. Thus as shown, the member C is of a double tapered or conoidal 'form and when placed wlthin the casing, will merely accelerate the velocity of the gas .current without reduction in the volume which may pass in any given interva The member s attached to a stem D which is connected to the throttle by suitable mechanism, such as the rack E on said stem engaging the segmental rack F upon the stem G of the throttle. To permit of this arrangement the casing A is bent or oflset so that the stem D in passing out through the bend will be properly located for engagement with the segmental rack. The spring H furnishin the opposing force is preferabl sleeve about t housing I, also sleeved about said stem. One end of the spring abuts against a shoulder, preferably formed by a washer J at the inner end of the housing, while the opposite end of the sprin abuts against a collar K upon the stem. he tension of the spring may be altered by adjusting the housing I longitudinally with respect to the stem and this is preferably accomplished by threading the outer surface of the housing, as indicated at L, and engaging the same with a nut M arran ed in a slot in the casing A, the housing ing held from turning by a pin or screw L engaging a longitudinal groove L therein. This nut may be locked from turning by suitable means such as a pin N inserted in a recess in the casing A and engaging any one of a series of notches O in the periphery of the nut. The pin N in turn is locked from detachment by a padlock P engaging a recess Q in the casing e stem D and is arrange within a and a registerlng recess R in the pin. Thus,

after the housing I is properly adjusted to tension the spring for producing a desired governing effect, the chan e of such adjustment is prevented by the scribed.

For convenience in manufacture the tapering section of the casing in which the member 0 operates is formed of a separate member S, which is placed as a bushing within the casing A and which is locked therein by the set screw S. The throttle B locking means demember V which encloses the mechanism within a recess X in the casing.

In operation, the member C practically floats within the gas current, being only guided by the felt washer J and by a bearing, such as the roller Y, which opposes the thrust of the'rack segment F. Thus friction. in the mechanism is reduced to the minimum and the member C is free to respond to variations in static pressure, due to variations in velocity of the gas current-and without impedients of the flow'thereof.

' It will be noted that the member C in connection with the tapering bushing 8' forms in effect a venturi and therefore permits the flow of gases therebetween with less resistance than when passing through a straight passage of greater area. This in addition to the stream-lining of the member 0 has the effect of avoiding impedients to the flow of ases.

rom the above description, it will be seen that the fluid actuated member C actuates the throttle B to vary the position of the latter from a minimum opening to a maximum opening according to the difierdifferential static pressure 7 the velocity of gases throng the intake, a

ential pressure upon said member. However, the stream lining of the member C reduces the throttling effect thereof by reducing the resistance to the flow of the gas current therearound. This is of great importance when the engine is operating under conditions requiring the maximum power output, since under such conditions with the throttle in wide open position it is possible to introduce a larger volume through the induction conduit than with the prior governor constructions wherein the actuatin member is not stream lined.

W at I claim as my invention is 1. In a governor for internal combustion engines, the combination with an intake and a trottle therefor, of means for adjusting said throttle comprising a stem extending axially of the intake, an operating connection between said stem and the throttle, a stream-lined head on said stem subjected to roportional to spring sleeved about said stem having one end bearing against a shoulder thereon, a housing surrounding said stem and spring, forming an abutment for the opposite end of the spring, and means for adjusting said housing longitudinally to vary the tension of the. spring.

2. A governor for internal combustion engines, comprising a casing forming a ortion of the engine intake and bent to orm an oifset, a throttle in one portion of said casing, a stem extending axially through another portion of said casing and passing out therefrom, an operating connection between said stem and throttle outside the intake assage, a head upoii said stem subjecte to for adjusting the same longitudinally to vary the tension of the spring.

'3. A governor for internal combustion en gines, comprising a casing forming a portion of the intake'tand having an offset therein, a throttle in one portion of said casing, a stem extending axially of the offset ortion of said casing and passin out there rom, a head upon said stem su jected to differential static pressure proportional to the velocity of gases through the intake, 8. spring sleeved upon said stem and abutting at one end against a shoulder thereon, a housing surrounding said s ring and stem forming an abutment for t e opposite end of the spring, said housing having an external] threaded portion projecting out throu ii an aperture in said casing, and a threa ed nut for engaging said housing outside said casing, forming a means for adjustingthe same to form the tension upon the spring.

4. A governor for internal combustion engines, comprising a casing forming a portion of the intake and forming an offset therein, a throttle insaid casing, a stem extending axially of the offset portion of the vspring and forming an abutment for the opposite end of the spring, said housing having an externally threaded portion passing out from-said casing, a nut engaging the threaded portion of said housing and located between opposed shoulders on said casing, forming a means for adjusting the housing longitudinally to alter the tension of thespring, and means for locking said nut from rotation.

5. A governor for internal combustion engines, comprising a casing having an olfset portion, a throttle in said casing, a stem extending axially of the offset portion of said casing and out therefrom, a head on said stem subjected to the differential static pressure proportional to the velocity of gases through the intake, a spring surroundmg said stem, one end abutting against a shoulder thereon, a housing surrounding said stem and spring, forming an abutment for the opposite end of the sprm said housing havingan externally threa ed portion, a .nut engaging said threaded. portion wrranged between opposed shoulders on said casing and forming a means for adjusting the housing to ,vary the tension of said spring, a rack face on a portion of said stem, and a rock arm on said throttle having a segmental rack for engaging the rack on said stem.

6. A governor for internl combustion engines, comprising a casing having an offset portion and an external recessed portion, a

throttle in said casing with its actuating rock shaft extending into said recessed portion, a floating member in the offset portion of said casing, a stem for said floating member extending into said recessed portion, an 15 operating connection between said stem and rock shaft, a spring sleeved on said stem and forming an opposing pressure thereon, a cover for said recessed portion, a rock shaft in alignment with the rock shaft of said 20 throttle passing through said cover, a lost motion clutch between said rock shafts, and a manually operable connection to the rock shaft in said COVEI for actuating said throttle. 4

In testimony whereof I afiix my signature.

SIGYARD H. JENSEN. 

